Steam chest for pumps



R. B. arl-xn ET'AL STEAM CHEST .FOR PUMPS 5V Sheets-Sheet 1 Filed Dec. 2, 1919 .WWW

Augu 31, 19m

R. B. REID ET AL STEAM CHEST FOR PUMPS Filed DeG. 2,- 1919 5 Sheets-Sheet 2 Aug. 31,1926. 1,598,311

R. B. REED ET AL.

STEAM CHEST FOR PUMPS Filed nec. 2, 1919 5 sheets-sxwet 5 A TTORNEYS Aug. 31 1926.

R B. REED E' Al- STEAM CHEST FOR PUMPS v Filed Dec. 2; 1919 5 Sheets-Sheet A 12,5, Qegl l /TTUHNEVSM Aug. 3l, 1926. l 1,598,311

|=c B. REID r-:r AL

`sTEAM'HEsT FOR PUMPS Filed Deo. 2, 1919 v Y 5 sheets-sheet s A TTU/WE V8 Patented ug. 31, 1926.

UNITED s'rarss PATENT ori-*ic ROSWELL BURNS REID AND HARRY JACOB LEWELLEN, OF GONNELLSVILLE, PENN- SYLVANIA, ASSIGNORS TO BOYTS, PORTER c CO., OF CONNELLSVILLE, ?ENNSYL VANIA.

STEAM CHEST FOR PUMPS.

Application filed December 2, 1919.

Our invention relates generally to steam chests and particularly to a chest adapted for use in conjunction with a pump, the purpose of our invention being the provision of a steam chest in which the oscillating valve for controlling the action of the usual slide and auxiliary valves is removably associated with the chest to permit of the reseating orsubstitution of the valve without necessitating the removal of the steam chest to a repair shop.

It is also a purpose of our invention to provide a steam chest in which the oscillating valve is seated and pressed by the operating fluid against the head instead of in the body of the steam chest, whereby it is only necessary to reface the valve and inner surface of the head to make a new and perfect seat for the valve.

We will describe one form of steam chest embodying our invention, and will then point out the novel features thereof in claims.

In the accompanying, drawings Figure 1 is a view, showing in end elevation one form of steam chest embodying our invention;

Figure 2 is a view, showing in front elevation the steam chest shown in Figure 1 with a portion of the chest head removed;

Figure 3 is a topplan view ofy Figure 2;

Figure el is a view, showing in elevation the inner side of the removable portion of the chest head;

Figure 5 is a central horizontal sectional view of Figure l;

Figure 6 is a fragmentary vertical sectional view of Figure el;

Figure 7 is a view, showing in side elevation, and partly in section, one form of valve embodying my invention adapted to be used in conjunction with the chest head shown in the preceding figures; I

Figures 8 and 9 are views, showing in front and rear elevation, respectively, the valve shown in Figure 7 Figure 10 is a diagrammatic view, showing the steam passages and ports and the manner in which they are controlled by the valve.

Fig. 11 is a perspective view, with parts disassembled, ofthe steam chest,

Fig. 12 is a Vcross section illustrating the relation of the steam chest to the engine cylinder,

Serial No. 341,978.

Fig. 13 is a longitudinal section on the line 13-13 of Fig. 12, and

Fig. 14- is a front elevation of the steam chest showing (in dotted lines) the positions of the steam ports when the oscillating valve handle is turned to the right.

Similar reference characters refer to similar parts in each of the several views.

Referring specilically to the drawings, and particularly to Figures 1, 2 and 3, B designates the body of the steam chest which is of cylindrical formation and is provided at its opposite ends with annular flanges 15 to which head plates 15 are adapted to be bolted for closing the ends of the body. The under side of the body B is formed with a base plate 1G for the purpose of securing the steam chest as a unit in proper distributing position upon the steam cylinder C (Figs. 12 and inside of the steam chest is an auxiliary piston which has a recess 34- to receive the shank 35 of a slide or a D-valve 36. The auxiliary piston is adapted to reciprocate, and the slide valve controls the various steam passages shown in F ig. 13, of which 37 is the inlet, 38 the exhaust, 39 the port to the right end of cylinder C, and d() the port `to the left end. The auxiliary valve carries a rod 36a which in practice may be used to reciprocate it by hand. This feature has no bearing on the invention and therefore needs no elaboration. Formed at one side of the `body B is a chest including a flanged section H formedintegral with the body B and a second section or head H detachably associated with the section H. The section H is of cylindrical formation to 'provide a pocket 17 in which is adapted to work an oscillatory valve V, and, as shown in Figure 2, the inner wall of the pocket is formed axially thereof with an opening 17L which is adapted toreceive a projection 18 (Figure 7) formed on the valve to properly position the same within the pocket. As shown in Figures 2 and 3, the outer end of the section H is flanged, as at 19, and provided with holes to receive bolts 2O (Figure 1) which extend through the liange 19 and through a similarl flange 19l formed on the confronting end of the removable head section MH for securing the two sections together to provide a housing for the valve (lll V. The construction ot the section H is clearly illustrated in Figures 4t and 5, wherein it will be seen that inside the vtla je 19, a circular boss 21 is termed, and extendingl radially on the outside oi said head are thickened portions 22, 23 and 2lwhich are provided with ports 22", 2%, aud 21, respectively, that eon'imunicate with .ports 22h, 2i: b, and 24?, respectively, termed in the boss 2l. As shown in Figure 5, the inner side ot the boss 21 projects beyond the surthee ot the flange 19, and this projected portion is adapted to tit snugly within the pocket 17 ot the section H. The head El is bored axially and is provided at its outer side with an annular collar 21L through which a shaft 25 tor the valve V is adapted to extend. This collar is shown threaded 'for the purpose or receiving a stu'tling box 21c which is illustrated in Figures 11 and l2.

The inner side o'l the boss 21 is provided with a pair ot pins 2G and 2G which are adapted to limit the movement ot the valve V as will be described hereinafter.

As clearly shown in Figures 1 and 3, the upper side of the body l is formed with afpoclet 27 to which a suitable torni et lulu'ieator (not shown) is adapted to be connected tor eilecting` the lubrication et the auxiliary and slide ialves contained within the body. As shown in Figure 2, the inner tace ot the pocket 17 is provided i th a port 17b through which steam from the body B is adapted to enter the pocket, and steam from the pocket 17 is adapted to be returned to the body B through the ports in the section H and other ports 28 and 2S in the section H.

Thevalve V is oit the oscillatory type, de tails of which are shown in Figs. 7, 8 and 9. An arcuate steam inlet port 31 occupies approximately the lower halt of the valve (Fig. 9) and extends completely through (Fig. 7) in order to transfer steam trom the pocket 17 to one or the other ot the ports 221 or 23h (Figs. 4 and lil) with which said inlet port happens to be in registration.

A depression or cavity 32 on the trent tace (Figs. 7 and 8) ot the valve furnishes a space adjacent to the confronting tace et the pocket- 17 which is lilled with live steam while the pump is in operation. An exhaust passage 32 is formed on the reverse face ot' thefvalve, occupying approximately the upper half as shown in Figs. 8, 9 and 14. In this respect the exhaust port is like the inlet port 31, the passage 32, however, does not extend through (Figs. 7 and 12). The shoulders 31, 31b (Fig, 9) formed by the inlet port 31 furnish abutments which strike against 'the pins 26 and 26 on the head H (Fig. l) to limit the oscillation of the valve.

The operation of the mechanism is as follows: Steam is initially admitted at the inlet 37 (Fig. 13) whence it occupies the chamber 41 of the steam chest. The port 171J (Figs. 2, 11 and 12) has been described a'liording a passage between the chest and the valve pocket 17. lNere it not 'for an annular reduction 4t2 on the auxiliary piston this passage would be cut oil', but said reduction is provided for the expressv purpose olf maintaining a continuous steam communication through 17) between the in terior l1 of the steam chest l) and pocket 17.

Consider the oscillatory valve if" as han ing` been turned toward the lett as in liigs. 1() and lil. The inlet port 31 will establish communication between the port 22b and the interior ot the pocket 17 so that steam flows from the chamber t1 (Fig. 125), port 17) into pocket 17, port 31, ports 22b and 22:l to the passage 28 which leads to the right end et the chest B. The auxiliary piston (Fig. 13) will naturally be torced to the le tt, carrying the -val.ve 3G with it. Steam which we new consider as entering the port eil), will be eut o and the port 8f) will be opened.

Exhaust steam from the lett end ot the steam chest will be i'orced through the lett pasage 28 (Fig. let) ports 23 and arcuate passage 2L and out at the central exhaust ports 2li-b, 2411 and 29. A reversal et the oscillatory valve produces a reversal et the pass ne ot live and exhaust steam in the various ports.

Should the valve V for any reason become *l ineffective to properly control the passages and ports in the manner just described, it is obvious that a new valve may be substituted or the present one repaired by removing the section H ot the chest head, Vthus permitting` the ready removal. ot the valve and shaft 251 rlhis mounting of the valve so as to permit itsl removability trom the steam chest is one ot the important objects of our invention7 as in steam chests et the ordinary construction, the valve is so associated with the. chest as to necessitate the removal ot the entire steam chest in order that the valve may be repaired or a new one substituted. It is manifest that with the valve of our construction, associated with the steam chest in the manner described, the necessity of removing the entire steam chest is eliminated, and the 'alve can be repaired or a new one substituted without in any way disturbing the mounting ot the steam chest.

Although we have herein shown and described only one form of steam chest embodying our invention, it is to be understood that various changes and modifications may be resorted to without departing from the spirit ot the invention and the spirit and scope of the appended claims.

Having thus described our invention, we claim:

1. A steam chest comprising a body having a steam chamber provided with a steam inlet and a port furnishing an outlet for steam from the chamber, a circular valve pocket formed in an exposed face of the body communicating with said chamber to receive live steam through said steam port, an exhaust passage opening on said exposed iface and being adapted to communicate with an exhaust port and a pair of intake passages also opening on said exposed face; a head providing a closure ior said pocket having ports furnishing communication between said respective passages and the interior ot said valve pocket, and a valve operable in said pocket having an inlet port extending' through from side to side to `furnish communication between said steam port and one of the intake passages in the head and having an exhaust passage formed in the iace confronting the head to furnish communieation between the other intake passage and the exhaust passage.

2. A steam chest comprising a body having a steam chamber provided with a steam inlet, a circular valve pocket formed in an exposed face of the body communicating with said chamber through a steam port, a substantially upright exhaust passage opening on said exposed i'ace and being adapted to communicate with an exhaust port and with a pair o'l intake passages situated laterally of said exhaust passage, said pair of passages also opening on said exposed aee; a head providing a closure for said pocket having an independent port for each of three passages furnishing communication between said respeetive passages and the interior ot said valve pocket, and a valve operable in said pocket having an inlet port extending through from side to side to furnish communication between said steam port and one o1 the intake passages in the head and having an exhaust passage formed in the iace confronting the head to furnish communication between the other intake passage and the exhaust passage7 said valve having a. depression in the face confronting the steam port to receive steam pressure to forcibly seat the valve against the inside of the head.

3. A steam chest comprising a body having a steam chamber provided with a steam inlet7 a flange formed upon the body having a circular valve pocket, there being a steam port providing perpetual communication between the steam chamber and the pocket, an exhaust passage in the body opening upon the liront face of the flange, a pair of intake passages in the body each opening upon the front face of the flange at places opposite each other, a head to lit upon the flange and cover the valve pocket, said head having three ports each respectively registering with one of said passages, and a valve operable in said pocket having a depression in the faee confronting the steam port to receive the direct impact of the steam and steam chamber-pressure to thereby be foreibl seated against the inside of the valve head said valve having an inlet port extendin therethrough to furnish steam to one of said intake passages when the valve is properly turned and also having an exhaust passage formed in one face to provide eommunication betwen the other intake passage and the exhaust passage in the body.

ROSVELL BURNS REID. HARRY JACOB LEWELLEN.

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